Turkey-Greece, Azerbaijan-Armenia, China-Taiwan, Ethiopia, Egypt-Uganda, Saudi-Iran-Yemen, Congo, Myanmar, Afghanistan, Russia-Ukraine, Morocco-Western Sahara-Algeria, India-China, India-Pakistan, Syria
Maybe I've just been watching too much Caspian Report lately, and a lot of these issues are a century in the making, but damn if it doesn't feel like early WW2 issues arising along with the geopolitical implications of climate change.
Most of the world is at peace, it's a remarkable accomplishment.
But perhaps we can also thank global communications for making it that little bit harder (though still by no means impossible) to sufficiently otherise far away populations.
We are seeing the US sanction other countries when they do things we don't like - and we are getting sanctioned in turn.
That was the thesis of a book called The Great Illusion
https://en.wikipedia.org/wiki/The_Great_Illusion
The book argued a European war was very unlikely.
the economic interdependence between industrial countries would be "the real guarantor of the good behavior of one state to another", as it meant that war would be economically harmful to all the countries involved.
The book was published, to great acclaim, in... 1909.
Usually much more so.
Take India-China. Those borderguards were literally fighting eachother with rocks and sticks because they don't issue guns to them PRECISELY to avoid war.
A negative feedback loop is the opposite, a feedback mechanism that self-corrects or dampens the signal.
Re. the state of war, I suggest reading "Enlightenment Now" by Stephen Pinker. We are living through the most peaceful period in history.
All of the conflicts that you listed are just run of the mill civil wars/border skirmishes/empires with rather limited pan-ethnic ambitions.